Mutations generic type arguments broken (ts)

[ruisaraiva19]

Issue

With the vue-apollo@v3.0.0-rc.3 release, we can't explicitly say the $apollo.mutate method return type for the mutation result data value.

Example

const { data } = await this.$apollo.mutate<MutationResultInterface>({
  mutation: gql`mutation () { }`,
  variables: {
    id: 12345
  }
})

Version v3.0.0-rc.2

IDE knows that data is of type MutationResultInterface

Version v3.0.0-rc.3

IDE shows the thrown error: this.$apollo.mutate is expecting 0 type arguments, but got 1.

How do we explicitly say the return data type of a mutation now on v3.0.0-rc.3?